* fix: undo/redo, placeholder overlapping with text, horizontal cursor
refractor: removed a lot of state-management that was not required
* fix: forwarding ref to remirror for getting extra helper functions
* fix: icon type error
* fix: value type not supported error on page block
* style: spacing, and UX for add link
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Co-authored-by: Aaryan Khandelwal <aaryankhandu123@gmail.com>